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HT45F77 Datasheet(PDF) 71 Page - Holtek Semiconductor Inc

Part # HT45F77
Description  Body Fat Scale Flash MCU
PDF  203 Pages
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Manufacturer  HOLTEK [Holtek Semiconductor Inc]
Direct Link  http://www.holtek.com
Logo HOLTEK - Holtek Semiconductor Inc

HT45F77 Datasheet(HTML) 71 Page - Holtek Semiconductor Inc

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Rev. 1.20
70
De�e��e� 1�� 201�
Rev. 1.20
71
De�e��e� 1�� 201�
HT45F77
Body Fat Scale Flash MCU
HT45F77
Body Fat Scale Flash MCU
Port A Wake-up
TheHALTinstructionforcesthemicrocontrollerintotheSLEEPorIDLEModewhichpreserves
power,afeaturethatisimportantforbatteryandotherlow-powerapplications.Variousmethods
existtowake-upthemicrocontroller,oneofwhichistochangethelogicconditionononeofthePort
Apinsfromhightolow.Thisfunctionisespeciallysuitableforapplicationsthatcanbewokenup
viaexternalswitches.EachpinonPortAcanbeselectedindividuallytohavethiswake-upfeature
usingthePAWUregister.
PAWU Register
Bit
7
6
5
4
3
2
1
0
Na�e
D7
D�
D5
D�
D3
D2
D1
D0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
POR
0
0
0
0
0
0
0
0
Bit7~0
PortAbit7~bit0Wake-upControl
0:Disable
1:Enable
I/O Port Control Registers
EachI/OporthasitsowncontrolregisterknownasPAC~PEC,tocontroltheinput/output
configuration.Withthiscontrolregister,eachCMOSoutputorinputcanbereconfigured
dynamicallyundersoftwarecontrol.EachpinoftheI/Oportsisdirectlymappedtoabitinits
associatedportcontrolregister.FortheI/Opintofunctionasaninput,thecorrespondingbitofthe
controlregistermustbewrittenasa"1".Thiswillthenallowthelogicstateoftheinputpintobe
directlyreadbyinstructions.Whenthecorrespondingbitofthecontrolregisteriswrittenasa"0",
theI/OpinwillbesetupasaCMOSoutput.Ifthepiniscurrentlysetupasanoutput,instructions
canstillbeusedtoreadtheoutputregister.However,itshouldbenotedthattheprogramwillinfact
onlyreadthestatusoftheoutputdatalatchandnottheactuallogicstatusoftheoutputpin.
PAC Register
Bit
7
6
5
4
3
2
1
0
Na�e
D7
D�
D5
D�
D3
D2
D1
D0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
POR
1
1
1
1
1
1
1
1
Bit7~0
PortAbit7~bit0Input/OutputControl
0:Output
1:Input



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